نتایج جستجو برای: impact of wind

تعداد نتایج: 21204110  

2013
Richard Green Nicholas Vasilakos

This paper evaluates the impact of intermittent wind generation on hourly equilibrium prices and output, using data on expected wind generation capacity and demand for 2020. Hourly wind data for the period 1993-2005 are used to obtain wind output generation profiles for thirty regions (onshore and offshore) across Great Britain. Matching the wind profiles for each month to the actual hourly dem...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Somnath Baidya Roy Justin J Traiteur

Utility-scale large wind farms are rapidly growing in size and numbers all over the world. Data from a meteorological field campaign show that such wind farms can significantly affect near-surface air temperatures. These effects result from enhanced vertical mixing due to turbulence generated by wind turbine rotors. The impacts of wind farms on local weather can be minimized by changing rotor d...

Increasing demand for electricity and consequently running out of fossil fuel resources and negative impact of fossil fuels on the environment has led to the need for finding renewable energy sources. Iran has high potentiality in exploiting  wind energy because of its topology and various climatic conditions. For this purpose, optimal places for installing these facilities should be determined...

2017
Colm Lowery

Driven by a trend towards renewable forms of generation, in particular wind, the nature of power system operation is changing. With respect to wind power, the uncertainty of the wind becomes an issue which must be considered. Through the use of wind forecasting, this uncertainty may be managed. The error inherent in forecasting will impact system reliability and cost as will inaccuracies in ass...

2012
Caroline Draxl

Wind energy is a major source of power in over 70 countries across the world, and the worldwide share of wind energy in electricity consumption is growing. The introduction of significant amounts of wind energy into power systems makes accurate wind forecasting a crucial element of modern electrical grids. These systems require forecasts with temporal scales of tens of minutes to a few days in ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده اقتصاد و علوم اجتماعی 1389

چکیده: پژوهش حاضر به بررسی تطبیقی اعتماد اجتماعی در بین دبیران زن و مرد مقطع راهنمایی شهر ایلام می پردازد. امروزه در جوامع شاهد گسترش ارتباطات هستیم و با توجه به این که دامنه کنش های اجتماعی از حد روابط با آشنایان و دوستان فراتر رفته و به تعامل با کنشگران غربیه و نا آشنا گسترش یافته است، لزوم وجود اعتماد، بیش از پیش احساس می شود. اما با توجه به نقش دبیران در نهادهای آموزشی، در انتقال ارزش ها و...

Journal: :مدیریت خاک و تولید پایدار 0
سهیلا پویان دانش آموخته دانشگاه شیراز مریم میراکبری دانش آموخته دانشگاه شیراز سید فخرالدین افضلی استادیار دانشگاه شیراز

wind erosion climatic factor is a measure of climatic factors explaining the wind erosion erosivity. humidity and wind speed are climatic characteristics that must be considered as the erosion parameters. in this study, linear moment analysis (l-moments) and wind erosion climatic factor were used to evaluate the regional climate’s tendency effect on wind erosion in yazd province. wind erosion c...

Journal: :journal of operation and automation in power engineering 2007
k. afshar a. shokri gazafroudi

wind power generation is variable and uncertain. in the power systems with high penetration of wind power, determination of equivalent operating reserve is the main concern of systems operator. in this paper, a model is proposed to determine operating reserves in simultaneous market clearing of energy and reserve by stochastic programming based on scenarios generated via monte carlo simulation ...

Journal: :international journal of environmental research 0
p. gallardo department of agronomy, university of almeria, spain j. salazar department of economics and business, university of almeria, spain f. j. lozano department of agronomy, university of almeria, spain m. c. navarro department of economics and business, university of almeria, spain c. asensio department of agronomy. university of almeria, spain

the influence of wind erosion on soil productivity was studied applying fan-forced wind in a wind tunnel located in the campo de nijar area in se spain where the main crops are cereals. wind erosion is highly variable depending on the type of soil (aric-haplic calcisols, aric-calcaric cambisols or aric-calcic luvisols, according to iuss working group wrb, 2014) and the time elapsed since the la...

2016
A K Pradhan S K Kar M K Mohanty

The continuous power supply for rural areas can be possible by using renewable hybrid power generation system and also reduction of the energy storage devices for the system. The impact of the shortage of power supply probability, surpluspower power generation, ratio of the energy supply to load demand, renewable fraction of different types of energy resources (solar and wind) and the combined ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید